Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a69c507788f330…

MALICIOUS

PDF

42.1 KB Created: 2020-04-03 07:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: ad067929e0d4d18ae2aa954326630431 SHA-1: 0af4702dcf2b4ed6197f4bfc212289e1ec7008d8 SHA-256: c0a69c507788f3307ab87be26e2e78ad870779312db432812345ea20a2e8a69a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a mass of external PDF links hosted on various domains. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://lifestylebeautysupply.org/uploads/1/3/0/7/130738936/130738936.html#como+se+forma+un+enlace+covalente+simple+doble+y+triple PDF link annotation
    • http://clearviewglassrepair.com/uploads/1/3/1/0/131070925/magefopupuj.pdfIn PDF document text
    • http://yorktownplumbingandheating.com/uploads/1/3/0/4/130476263/zudemolububuk-navuxad-bilibiw.pdfIn PDF document text
    • http://401kmoneymanager.com/uploads/1/3/0/2/130272406/setepi-watun-muxegukugatuvut.pdfIn PDF document text
    • http://ultimatemattressfl.com/uploads/1/3/0/6/130639107/f0dd556ec.pdfIn PDF document text
    • http://rollingoaksmemorialcenter.us/uploads/1/3/1/3/131383613/b9aaf7a7ac5aa9b.pdfIn PDF document text
    • http://emiscapital.com/uploads/1/3/0/9/130969710/6798428.pdfIn PDF document text
    • http://atenziarecords.com/uploads/1/3/0/2/130291463/lerotewivajofa.pdfIn PDF document text
    • http://krishnaandnatansh.com/uploads/1/3/0/5/130588769/feziluvakipu.pdfIn PDF document text
    • http://shanalathrop.com/uploads/1/3/1/1/131163992/3235323.pdfIn PDF document text
    • http://screen2rent.be/uploads/1/3/0/2/130288421/8059834.pdfIn PDF document text
    • http://mywebpagemanager.com/uploads/1/3/0/7/130776591/wexumuwa.pdfIn PDF document text
    • http://metcalfe4pa.org/uploads/1/3/0/2/130287972/dupajotegoju.pdfIn PDF document text
    • http://human.enterprises/uploads/1/3/0/4/130483633/6edf523d60.pdfIn PDF document text
    • http://intranet.tfcrecycling.com/uploads/1/3/0/8/130874495/zofisuzizapim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E51 8516 bytes
SHA-256: 868d3b6a3f3d99c93424a8a6d55cb3c29f7167ce149c2c89ca62f0f890e4f067
font_01_sfnt_off00008da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA0 3080 bytes
SHA-256: 875c0a3286263cf31596929f8efdcde078b9025197064aeb2ff98ea4f61344e0

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